void Print(void);
void Add(int x,int y);

typedef struct point
{
   int x;
   int y;
} pnt;
struct shell
{
   void (*Print)(void);
   void (*Add)(int x,int y);
   pnt *_point;
};

shell *Init(void);

from ctypes import *

ex_obj = CDLL("libexample.so")

class my_point(Structure):
     _fields_ = [("x",c_int),("y",c_int)]

class shell(Structure):
     pass
shell._fields_ = [("p",POINTER(my_point)),...]

ex_obj.Init.restype = POINTER(shell)

s1 = ex_obj.Init()
print s1.p.x

...
AttributeError: 'LP_shell' object has no attribute 'p'
...

     ...
     s1 = ex_obj.Init()[0]
     ...

     ...
     print s1.p.contents.x
     ...

     ...
     PRNFUNC = CFUNCTYPE(c_void_p,c_void_p)
     ADDFUNC = CFUNCTYPE(c_void_p,c_int,c_int)
     ...
     class myclass(Structure):
          pass
     myclass._fields_ = [...,("Print",PRNFUNC),("Add",ADDFUNC),...]